Our CO sensor with relay solution offers you two field adjustable volt free relays with normally open & normally closed contacts both. Each relay is rated at 250V at 5A.
Powered by 24VAC/DC. The unit also offers an option to re-transmit the analogue output (field adjustable between 4-20mA or 2-10VDC) to your PLC/BMS/controller if you wish.
The switching differential of the relays are fixed at ~2% of the measuring range, however if you only need one relay you could connect them in series to get a larger differential.
This kit product is made up off:
1x GAS-CO: GAS-CO-150-D Sensor Transmitter for Carbon Monoxide